📄 function.pg-execute.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Sends a request to execute a prepared statement with given parameters, and waits for the result.</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.pg-escape-string.html">pg_escape_string</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.pg-fetch-all-columns.html">pg_fetch_all_columns</a></div> <div class="up"><a href="ref.pgsql.html">PostgreSQL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.pg-execute" class="refentry"> <div class="refnamediv"> <h1 class="refname">pg_execute</h1> <p class="verinfo">(PHP 5 >= 5.1.0)</p><p class="refpurpose"><span class="refname">pg_execute</span> — <span class="dc-title">Sends a request to execute a prepared statement with given parameters, and waits for the result.</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">resource</span> <span class="methodname"><b><b>pg_execute</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$connection</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$stmtname</tt></span> , <span class="methodparam"><span class="type">array</span> <tt class="parameter">$params</tt></span> )</div> <div class="methodsynopsis dc-description"> <span class="type">resource</span> <span class="methodname"><b><b>pg_execute</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$stmtname</tt></span> , <span class="methodparam"><span class="type">array</span> <tt class="parameter">$params</tt></span> )</div> <p class="para rdfs-comment"> Sends a request to execute a prepared statement with given parameters, and waits for the result. </p> <p class="para"> <b>pg_execute()</b> is like <a href="function.pg-query-params.html" class="function">pg_query_params()</a>, but the command to be executed is specified by naming a previously-prepared statement, instead of giving a query string. This feature allows commands that will be used repeatedly to be parsed and planned just once, rather than each time they are executed. The statement must have been prepared previously in the current session. <b>pg_execute()</b> is supported only against PostgreSQL 7.4 or higher connections; it will fail when using earlier versions. </p> <p class="para"> The parameters are identical to <a href="function.pg-query-params.html" class="function">pg_query_params()</a>, except that the name of a prepared statement is given instead of a query string. </p> </div><div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">connection</tt></i></span> <dd> <p class="para"> PostgreSQL database connection resource. When <i><tt class="parameter">connection</tt></i> is not present, the default connection is used. The default connection is the last connection made by <a href="function.pg-connect.html" class="function">pg_connect()</a> or <a href="function.pg-pconnect.html" class="function">pg_pconnect()</a>. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">stmtname</tt></i></span> <dd> <p class="para"> The name of the prepared statement to execute. if "" is specified, then the unnamed statement is executed. The name must have been previously prepared using <a href="function.pg-prepare.html" class="function">pg_prepare()</a>, <a href="function.pg-send-prepare.html" class="function">pg_send_prepare()</a> or a <i>PREPARE</i> SQL command. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">params</tt></i></span> <dd> <p class="para"> An array of parameter values to substitute for the $1, $2, etc. placeholders in the original prepared query string. The number of elements in the array must match the number of placeholders. </p> <div class="warning"><b class="warning">Warning</b> <p class="para"> Elements are converted to strings by calling this function. </p> </div> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> A query result resource on success, or <b><tt>FALSE</tt></b> on failure.</p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 Using <b>pg_execute()</b></b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// Connect to a database named "mary"<br /></span><span style="color: #0000BB">$dbconn </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"dbname=mary"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Prepare a query for execution<br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_prepare</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbconn</span><span style="color: #007700">, </span><span style="color: #DD0000">"my_query"</span><span style="color: #007700">, </span><span style="color: #DD0000">'SELECT * FROM shops WHERE name = $1'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Execute the prepared query. Note that it is not necessary to escape<br />// the string "Joe's Widgets" in any way<br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbconn</span><span style="color: #007700">, </span><span style="color: #DD0000">"my_query"</span><span style="color: #007700">, array(</span><span style="color: #DD0000">"Joe's Widgets"</span><span style="color: #007700">));<br /><br /></span><span style="color: #FF8000">// Execute the same prepared query, this time with a different parameter<br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbconn</span><span style="color: #007700">, </span><span style="color: #DD0000">"my_query"</span><span style="color: #007700">, array(</span><span style="color: #DD0000">"Clothes Clothes Clothes"</span><span style="color: #007700">));<br /><br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.pg-prepare.html" class="function" rel="rdfs-seeAlso">pg_prepare()</a></li> <li class="member"><a href="function.pg-send-prepare.html" class="function" rel="rdfs-seeAlso">pg_send_prepare()</a></li> <li class="member"><a href="function.pg-query-params.html" class="function" rel="rdfs-seeAlso">pg_query_params()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.pg-escape-string.html">pg_escape_string</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.pg-fetch-all-columns.html">pg_fetch_all_columns</a></div> <div class="up"><a href="ref.pgsql.html">PostgreSQL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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